Baking Instructions -
Every oven bakes the Lava cake differently. You can prefer to set your over temperature from 170 degree Celsius to 200 degree Celsius. It should bake between 10-15 mins.
Also, while cooking in the oven, if your cake starts to burn on the top without cooking the sides, make sure you cover the ramekins with aluminium foil and cook for about 7 mins and remove the foil and cook for 5 mins. Adjust these timings as per your oven. (The motive of this method is to cook the Lava cake on the sides and keep a molten center)
Also the quality of Chocolate you use matters, since the richness of cake depends on the chocolate you use.